Ecology Review Worksheet â Part II. 1. Fill in the chart with a ... What is nitrogen fixation? Why is it ... Define the vocabulary words in the boxe...
1. Fill in the chart with a description that describes how water moves through as ecosystem.
Process Precipitation
Description
Evaporation Transpiration Condensation
2. Explain how carbon moves from autotrophs Æ consumers Æ decomposers. What role do fossil fuels play? _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ 3. Which two major processes are involved in the oxygen cycle? a. ______________________________________ b. _____________________________________ 4. Explain how phosphorous is obtained & moves through the following food chain: Grass Æ Rabbit Æ Fox
_______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ 5. What is nitrogen fixation? Why is it important?
_______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ 6. What is biodiversity? Give at least one reason/example as to why it is important to humans? _______________________________________________________________________________________ _______________________________________________________________________________________ 7. What are the consequences to a loss of biodiversity? _______________________________________________________________________________________ _______________________________________________________________________________________
8. Define the vocabulary words in the boxes below:
Symbiotic
Mutualism
Commensalism
Parasitism
Example
Example
Example
9. For the paragraph on Succession, fill in the blanks using the words provided: abiotic factors ecosystems lichen pioneer species
climax community quicker succession soil
fire primary succession secondary succession moss
lava slower rock intact
________________________ are constantly changing. Both (b) ________________________ and biotic factors change in every ecosystem. One type of ecosystem change is called (c) ______________________. This results in one community replacing another over time. This process might begin on bare rock formed from the cooling of molten (d) __________________. This process begins when (e) ________________ & (f) ________________, also known as the (g) _________________________________________, begin living on and breaking down bare rock. When these organisms die, their remains mix with the rock pieces to form a thin layer of (h) __________________________. This process of establishing and developing an ecosystem in a previously uninhabited area is called (i) ________________________________. The mature community that eventually forms is called the (j) ________________________________________. Sometimes that community is destroyed by a (k) ___________________________. A new community will replace the destroyed one through the process of (l) ______________________________________. This process happens much (m) __________________ because the soil is usually left (n) __________________.
10. Label and define the 3 stages of population growth in the graph below.
11. Match the graph with the appropriate pattern/term.
a. b. c. d.
Slow growth Negative growth Zero growth Rapid groth
12. Compare and contrast Density Dependent & Density Independent factors 13. Create an energy pyramid below, using the following food chain as an example:
Grass Æ rabbit Æ snake Æ hawk Assume there is 53.2Kcal of energy available to the 3˚consumer. Use arrows to show the flow of energy.
a. Label each trophic level b. How much energy is available to the rabbit? _______________________ c. What happens to the rest of the energy at each trophic level? __________________________________ __________________________________
14. What is missing from most food webs and energy pyramids, but is absolutely necessary in each ecosystem? _____________________________________________________________________________ 15. In what way(s) do humans through the phosphorus cycle out of balance? _______________________________________________________________________________________ _______________________________________________________________________________________ 16. Which process occurs naturally, and is necessary to sustain life on earth, but is currently “kicked in overdrive” because of human contribution? ___________________________________________________
